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Microstructural Variation at Interface during Fiber Laser Joining of NiTi/Ti6Al4V and effect of Mechanical Strength
Journal of Materials Processing Technology ( IF 6.3 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.jmatprotec.2020.116661
Suman Chatterjee , Ankit Kumar Pandey , Siba Sankar Mahapatra , Kanwer Singh Arora , Ajit Behera

Abstract Welding of nitinol (NiTi) shape memory alloy (SMA) and titanium-based alloy (Ti6Al4V) finds potential application in aerospace and medical industries. However, joining of these materials poses challenging issues because material properties of each material interacts to give rise to hybrid system performance. In the present study, copper was used as an intermediate layer to restrict the formation of brittle intermetallics during welding of NiTi with Ti6Al4V using laser welding. The formation of Cu4Ti3 and CuNi2Ti complex phases attempts to minimize the formation of brittle phases like Ti2Ni. It was observed that the maximum welding strength of 353 MPa could be achieved at 800 W laser power and 17 mm/s scan speed. Physical analysis of weldments indicates the presence of pores at nano-levels (

中文翻译:

NiTi/Ti6Al4V光纤激光连接过程中界面的微观结构变化和机械强度的影响

摘要 镍钛诺 (NiTi) 形状记忆合金 (SMA) 和钛基合金 (Ti6Al4V) 的焊接在航空航天和医疗行业具有潜在应用。然而,这些材料的连接带来了具有挑战性的问题,因为每种材料的材料特性相互作用以产生混合系统性能。在本研究中,铜被用作中间层,以在使用激光焊接将 NiTi 与 Ti6Al4V 焊接时限制脆性金属间化合物的形成。Cu4Ti3 和 CuNi2Ti 复合相的形成试图尽量减少像 Ti2Ni 这样的脆性相的形成。据观察,在 800 W 的激光功率和 17 mm/s 的扫描速度下可以达到 353 MPa 的最大焊接强度。焊件的物理分析表明存在纳米级孔隙(
更新日期:2020-08-01
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